What are the ATS/ERS criteria for diffusing capacity of lung for carbon monoxide (DLCO) repeatability testing?

Updated: May 14, 2020
  • Author: Kevin McCarthy, RPFT; Chief Editor: Nader Kamangar, MD, FACP, FCCP, FCCM  more...
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The 2017 criterion for DLCO repeatability is as follows:

  • At least two acceptable DLCO measurements within 2 mL/min/mm Hg (0.67 mmol/min/kPa) of each other (2005 standard was 3 mL/min/mm Hg or 1 mmol/min/kPa)

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